Shoes Insoles: Guide to Benefits, Differences & Choices

Most people don’t think about shoe insoles until a long walking day makes the feet file an official complaint. If you’ve weighed foam against gel in a pharmacy aisle, you’re in good company — NHS podiatry treats insoles as a first-line tool for foot pain, noting they can support and cushion the foot or change the way you walk (Guy’s and St Thomas’ NHS Foundation Trust (NHS patient guidance)). What the NHS recommends and what the bestseller lists sell don’t always line up; here’s how to tell the difference.

Adults who experience foot pain at some point: over 75% (American Podiatric Medical Association) ·
Insoles with supportive shoes help: about 75% of the time (Gloucester Health & Care NHS Trust) ·
NHS replacement interval: every 6–12 months (NHS guidance) ·
Custom orthotics in the UK: £100–£400 (NHS and private clinics) ·
Global insoles market (2023): $4.2 billion (Grand View Research)

Key facts at a glance

Four numbers explain most insole decisions: the £5 shelf, the £400 clinic, the six-month replacement, and the 75% who get better.

The pattern is the same across every NHS source: support, not restructuring. Keep that expectation and the rest of the buying decision gets simpler.

Is it good to put insoles in shoes?

The short answer is yes for most common foot pain — provided the shoe does its half of the job. The longer answer depends on matching the insole to your foot type and being realistic about what it can change.

General benefits of shoe insoles

• Insoles support and cushion the foot or change the way you walk (Guy’s and St Thomas’ NHS Foundation Trust).
• Orthoses can hold the foot in a neutral position when walking (Chelsea and Westminster Hospital NHS Foundation Trust).
• Simple arch supports can reduce strain in painful flat feet before you consider anything custom (East Sussex Healthcare NHS Trust).

Put simply, insoles give your foot a more supportive surface than the shoe’s original footbed. The benefit appears when the shoe stops fighting the insole.

Potential risks and drawbacks

• Insoles do not change the shape of your feet or form new arches (Guy’s and St Thomas’ NHS Foundation Trust (NHS flat-feet guidance)).
• Orthoses do not cure poor alignment, and they are generally only effective in laced training shoes (Chelsea and Westminster Hospital NHS Foundation Trust (NHS foot health leaflet)).
• Unsupportive shoes will stop you feeling better; Gloucester’s podiatry team also advises against barefoot walking and very thin-soled shoes (Gloucester Health & Care NHS Trust).

An insole overcorrects nothing. If the shoe is the problem, the insole is working for a losing team — and the pain will tell you before the insole wears out.

Who should consider using insoles

• People with symptomatic flat feet: soft over-the-counter orthoses may be as effective as custom insoles (St George’s University Hospitals NHS Foundation Trust).
• People with plantar fasciitis or high arches are the other classic candidates — NHS guidance points to foam or gel insoles with arch support.
• Children with flat feet usually need exercises and stretching before orthoses (Kent Community Health NHS Foundation Trust).

The implication: insoles are a targeted tool, not a general wellness product. Buy them when there’s a specific complaint — not because the shelf display looks convincing.

This approach keeps expectations grounded in what insoles can actually deliver.

What is the difference between shoe inserts and insoles?

The terms blur on shop shelves, but the functional split is clear: inserts add something to the shoe, insoles replace the footbed, and orthotics are a prescribed sub-set of insoles.

Definition of shoe inserts

• A shoe insert is anything placed inside the shoe — an umbrella term for insoles, cushions, and orthotic supports.
• In NHS patient guidance, insoles are themselves described as shoe inserts (Guy’s and St Thomas’ NHS Foundation Trust).
• In retail language, “insert” usually means a support layer added on top of the existing footbed rather than a full replacement.

Definition of insoles

• Insoles replace the shoe’s original footbed and run from heel to toe.
• They are usually foam, gel, or a combination, and the NHS’s working definition says they can change the way you walk.
• When an insole is prescribed by a podiatrist it becomes an orthosis — an in-shoe device intended to resist pronation and influence pain or foot function (East Sussex Healthcare NHS Trust (NHS podiatry fact sheet)).

Key differences in function and design

• Inserts typically add a layer of support; insoles replace the footbed entirely.
• Cushioning insoles focus on shock absorption; structured inserts focus on arch support and alignment.
• Custom orthotics are built from a clinical assessment and are usually stiffer than anything on a pharmacy shelf.

The distinction matters because it changes what you buy: a cushioning insole won’t fix an alignment problem, and a rigid orthotic won’t fix a shock-absorption problem.

Which are the best insoles for shoes?

Bestseller lists rank popularity, not biomechanics. The best insole is the one matched to your foot type, your activity, and the shoe you’ll wear it in.

NHS-recommended insoles

• NHS guidance points to foam or gel insoles with arch support for common foot problems.
• Orthoses are generally only effective in laced training shoes — the shoe has to hold them in place (Chelsea and Westminster Hospital NHS Foundation Trust).
• Some NHS trusts advise starting with a simple arch support before anything custom (East Sussex Healthcare NHS Trust).

Podiatrist-recommended brands and materials

• Materials matter more than brands: polyurethane foam for control, silicone gel for impact, memory foam for pressure relief.
• Pharmacy brands such as Scholl, Superfeet, and FootActive dominate shelves; podiatrists tend to look at arch profile and stiffness first.
• When over-the-counter options fail, an NHS podiatrist may prescribe a bespoke in-shoe orthotic to resist pronation (East Sussex Healthcare NHS Trust).

Top-rated insoles for walking, flat feet, and boots

• Walking: choose shock-absorbing insoles with moisture-wicking tops.
• Flat feet: a simple arch support is the rational first step before custom orthotics.
• Boots: a thin, firm insole reduces heel slip and keeps toes from jamming into the front of the toe box.

If you’re shopping for shoes that may reduce the need for insoles altogether, the same material logic applies — here’s a podiatrist’s view of Skechers sandals and whether their comfort claims hold up.

The pattern: for most feet, the best insole is the cheapest one that matches the complaint. Price becomes relevant only when the cheap fix fails.

This logic keeps your choice rooted in what the evidence actually supports.

Is foam or gel insoles better?

Foam and gel answer different questions: foam says “structure,” gel says “impact.”

Foam insoles: properties and use cases

• Foam insoles — polyurethane, EVA, or memory foam — provide firm support and mold to the foot over time.
• They suit standing-heavy days, stiff boots, and feet that want a stable base.
• A structured foam insole behaves more like a light orthotic, which is why podiatrists reach for it when alignment is the issue.

Gel insoles: properties and use cases

• Gel insoles offer superior shock absorption and are ideal for high-impact activities like running, hiking, and long pavement days.
• Silicone gel compresses under load and rebounds, reducing pressure under the heel and forefoot.
• The trade-off: gel cushions well but guides the arch less than a structured foam.

How to choose between foam and gel based on activity

• All-day walking: combination foam-gel builds balance support and cushioning.
• Running and high-impact sport: gel, or a gel heel insert, softens heel strike.
• Flat feet and overpronation: structured foam or a semi-rigid orthotic supports the arch better than soft gel alone.
• If you’re torn, the clinical evidence softens the fight: soft over-the-counter orthoses can relieve symptoms of symptomatic flat feet, so you don’t need the most expensive material to start (St George’s University Hospitals NHS Foundation Trust).

The trade-off: gel protects, foam controls. Buy the one that matches your complaint — cushioning for impact, support for alignment.

This approach ensures you’re reacting to your symptoms, not marketing claims.

How often should insoles be replaced?

Insoles wear out invisibly. The foam compresses, the gel hardens, and the foot quietly absorbs the difference.

Signs your insoles need replacing

• Visible creasing, flattening, or a permanent heel imprint.
• Cushioning that feels dead — a thumbnail pressed into the heel bed doesn’t rebound.
• Old foot pain creeping back after months of improvement (NHS guidance).

General replacement timeline by insole type

• Daily-wear foam or gel insoles: every 6–12 months.
• High-impact use, running, or heavy standing: every 3–6 months.
• Custom orthotics: follow the podiatrist’s review schedule rather than a calendar.

Factors that shorten insole lifespan

• Body weight and the impact of each step.
• Shoe flexibility — a bendy shoe flexes the insole more and fatigues it faster.
• Heat and moisture from sweaty feet break down foam faster.

The pattern is simple: if the support is gone, the insole is gone. Replace on a schedule, not on looks.

Foam, gel, or custom: side-by-side comparison

Three options dominate the UK market, and the difference comes down to one trade-off: how much structure you want versus how much shock you need to absorb.

The takeaway: most people can start with foam or gel and only move to custom when the cheap fix fails. Price should follow failure, not fear.

Pros and cons of wearing insoles

The trade-off: the same device that reduces strain can create pressure if the arch profile is wrong — start broad, adjust fast.

How to choose the right insole for your shoes

1. Check your arch at home. Wet your foot, step on a piece of paper, and study the imprint: more foot on the paper means a flatter arch that will want support.
2. Match material to complaint. Impact pain → gel; arch strain → firm foam; both → combination foam-gel.
3. Buy in your shoe size. Most insoles are sized and many can be trimmed; the insole should sit flat from heel to toe.
4. Fit them in the shoe you’ll actually wear. Orthoses are generally only effective in laced training shoes (Chelsea and Westminster Hospital NHS Foundation Trust).
5. Break in gradually. Start with two hours a day, then build up over a week.
6. Diary the pain. If symptoms don’t improve in two to four weeks, escalate to a podiatry referral instead of buying a pricier insole.

Why this matters: a stepped approach turns insole shopping from a lottery into an experiment — one data point at a time.

Confirmed facts vs. what’s still unclear

Why this matters: the gap between confirmed and unclear is exactly where misinformation lives — shop with both lists in mind.

What the experts say

Insoles are shoe inserts that can support and cushion the foot or change the way you walk.

Guy’s and St Thomas’ NHS Foundation Trust (NHS patient guidance)

Shoes and insoles will usually help about 75% of the time.

Gloucester Health & Care NHS Trust (NHS podiatry service)

Orthoses do not cure poor alignment, but can provide support and are generally only effective in laced training shoes.

Chelsea and Westminster Hospital NHS Foundation Trust (NHS foot health leaflet)

A shop-bought simple arch support insole may reduce strain and help painful symptoms in flat feet.

East Sussex Healthcare NHS Trust (NHS podiatry fact sheet)

What this means: all four are NHS institutions describing the same intervention — support, not correction. The commercial aisle sells magic; the evidence sells mechanics.

The verdict

The pattern is consistent across every NHS source we’ve consulted: insoles work when they’re simple, well-fitted, and paired with supportive shoes. The retail shelf wants you to believe a £40 insole fixes what a £10 one can’t; the evidence says start cheap and escalate only if the pain asks for it. For the average UK walker, the decision is clear: try a foam or gel arch support in a laced, supportive shoe first — or keep absorbing the cost of doing nothing in your feet, knees, and hips.

Related reading

If insoles are the fix, the shoe is the other half — see how podiatrists apply the same logic to sandals.

• Skechers Sandals: Podiatrist Views, Comfort & Sizing

Frequently asked questions